Bug 1694426

Description of problem:
Botting up system, triggering regular borgbackup script. Issue appeared after upgrading to Fedora 30 beta.

Version-Release number of selected component:
borgbackup-1.1.7-2.fc30

Additional info:
reporter:       libreport-2.10.0
cmdline:        /usr/bin/python3 /usr/bin/borg create -v --stats nasbox:/data/borg/::{hostname}-{now:%Y-%m-%d} /home/jh/
crash_function: resolve
exception_type: pkg_resources.ContextualVersionConflict
executable:     /usr/bin/borg
interpreter:    python3-3.7.2-7.fc30.x86_64
kernel:         5.0.0-300.fc30.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
__init__.py:786:resolve:pkg_resources.DistributionNotFound: The 'msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6' distribution was not found and is required by borgbackup

Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 583, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 900, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 791, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (msgpack 0.6.1 (/usr/lib64/python3.7/site-packages), Requirement.parse('msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6'), {'borgbackup'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/borg", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3191, in <module>
    @_call_aside
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3175, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3204, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 585, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 598, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 786, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6' distribution was not found and is required by borgbackup

Local variables in innermost frame:
self: <pkg_resources.WorkingSet object at 0x7f0ab87a07b8>
requirements: []
env: <pkg_resources.Environment object at 0x7f0ab87a0860>
installer: None
replace_conflicting: False
extras: None
processed: {Requirement.parse('borgbackup==1.1.7'): True}
best: {'borgbackup': borgbackup 1.1.7 (/usr/lib64/python3.7/site-packages), 'msgpack': None}
to_activate: [borgbackup 1.1.7 (/usr/lib64/python3.7/site-packages)]
req_extras: {Requirement.parse('msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6'): ()}
required_by: defaultdict(<class 'set'>, {Requirement.parse('msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6'): {'borgbackup'}})
req: Requirement.parse('msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6')
dist: None
ws: <pkg_resources.WorkingSet object at 0x7f0ab87a07b8>
requirers: {'borgbackup'}
new_requirements: [Requirement.parse('msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6')]
new_requirement: Requirement.parse('msgpack!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6')